Starshade Starlight-Suppression Performance: Modeling and Analysis of Error Sources

Computer Science – Performance

Scientific paper

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Scientific paper

Direct imaging and spectroscopy of terrestrial planets in the habitable zones of nearby stars has been identified as a key goal by the ASTRO2010 Decadal Survey. The starshade is one of two starlight-suppression architectures being considered to meet this goal in the next decade. Key technologies for this concept must be matured in the next several years to demonstrate that this is a feasible way to achieve the science goals. One of the challenges in this technology development effort is creating an error budget for the starshade shape and demonstrating a design that can meet those requirements. This budget must include error sources such as manufacturing accuracy, on-orbit thermal distortion, and on-orbit jitter. We report our latest progress in simulating the effects of these error sources on the starlight-suppression performance, combining them into an error budget for the starshade, and determining the ability of our structural design to meet the budgeted tolerances.

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